This study investigates the reactions of Na2SO4 and its effects on iron and nickel reduction in the roasting of a high-iron and low-nickel laterite ore through gas composition, X-ray diffraction, and scanning electron microscope analyses. Results showed that a reduction reaction of Na2SO4 to SO2 was performed with roasting up to 600°C. However, no clear influence on …
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In this work, iron ore tailing (IOT) was used for the production of two different materials: sodium silicate and geopolymers. Initially, reactions of IOT with NaOH were carried out by hydrothermal reaction in autoclave at 200 °C (1:1.5 and 1:2.5 SiO 2:NaOH molar ratio) and reaction times of 4 and 8 h.X-ray fluorescence by dispersive energy (XRF), X-ray diffraction …
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Thus, in this study, the author conducted hydrogen reduction of low-grade nickel laterite ore with the addition of sodium sulphate followed by magnetic separation to determine the effects of temperature, time, partial pressure of H 2 and content of sodium sulphate on the nickel reduction process. Moreover, the effects of different sodium ...
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Sodium sulfate is found to be capable of enhancing the reduction of laterite ore through liberating iron and nickel from Ni/Fe substituted-lizardite, as well as increasing the size …
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Fe–S solid solution could promote the ferronickel particles aggregation. A series of nickel laterite ores with different calculated amounts of anhydrous sodium sulphate were …
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DOI: 10.1016/J.MINPRO.2013.04.005 Corpus ID: 97396504; Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during reduction roasting process @article{Jiang2013MechanismOS, title={Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during reduction roasting process}, author={Man Jiang and Ti …
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Ni beneficiation of laterite ore by using direct reduction process is proposed. Sodium sulfate is capable of intensifying the reduction roasting of laterite. Average particle size of ferronickel grows up to 50 μm when reduced with Na 2 SO 4. Selective enrichment of Ni can be realized by suppressing the metallization of Fe. New-born troilite (FeS) facilitates the …
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Substituting cheap sodium sulfate for potassium sulfate, and calcining with calcium sulfate and lepidolite (0.15:0.45:1) at 900°C, the lithium recovery rate can also reach more than 90% (Vieceli N et al., 2016), but the leaching rate of lepidolite was 84% when calcining only with calcium sulfate at 1050°C (Siame E and Pascoe RD, 2011).
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Selective reduction process and magnetic separation of nickel lateritic ore were conducted through the two-stage thermal mechanism with the addition of sodium sulfate and sodium chloride as the ...
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The beneficiation process of lead-zinc ore is mainly processed by flotation, and at present, most of the lead and zinc are obtained by sulfide separation. ... which is strongly activated by copper ions, only sulfite has a …
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Request PDF | On Oct 6, 2017, U. Malayoğlu and others published Beneficiation of Denizli - Acıgöl sodium sulphate ore by exploiting its structural properties | Find, read and cite all the ...
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A V concentrate was achieved by a beneficiation and concentration process, including crushing ... Fe 2 O 3 and titanomagnetite (Fe 2.5 Ti 0.5 O 4) originating from the oxidation of the VTM ore and sodium iron silicon oxide (Na 0.95 (Fe 0.95 Si ... Environmental impact of sodium sulfate decomposition in silicate glass manufacturing. Alfred ...
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The distinctive oolitic structure within the ore is regarded as the primary factor causing the difficulty in the beneficiation of oolitic hematite ore. The objective of this study is to devise an effective approach to tackle the issue of beneficiation of oolitic hematite ore, thereby facilitating the utilization of oolitic hematite ore, which ...
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The increasing demand for stainless steel and the scarcity of sulfide nickel ore affect the increase of laterite nickel ore processing. One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. ... Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate ...
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Semi-preferential bulk-separation flotation of copper sulfide ore beneficiation ... Process flow: The dosage of sodium sulfide can reach 1~2kg/t during vulcanization. Because the film produced by vulcanization is not stable and is easy to fall off after vigorous stirring, and sodium sulfide itself is easily oxidized, sodium sulfide should be ...
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A brief analysis of the role of copper sulfate in ore beneficiation and flotation Copper sulfate, which appears as blue or blue-green crystals, is a widely used activator in sulfide ore flotation.
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The development of tin ore beneficiation. ... When used in combination with sodium alkyl sulfate and styrene phosphonic acid, it can expand the flotation area, which is beneficial to the floating of cassiterite. It can also be used as an inhibitor of gangue minerals to improve the concentrate grade. Carboxymethylcellulose is also a commonly ...
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Sodium dodecyl sulfate (SDS) was used as a dolomite collector in this study to reduce the acid consumption of collophane flotation. SDS effectively removed dolomite from the gravity concentrate ...
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Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was studied on the basis of process mineralogy. The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic oxidized ore, with …
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The successful result – which included better plant availability and nearly double the production – led to a further order for two more of these machines. Sodium sulphate is one of the chemical reagents used in roasting processing plants as part of the steel making process.
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In Part I, reduction/sulfidation behaviors of a saprolitic laterite ore in the presence of sodium sulfate were investigated, with an emphasis on thermodynamic analysis, selective …
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The characteristics of Huimin high phosphorus limonite ore and the beneficiation of this iron ore by sodium-carbonate-added carbothermic reduction, ultrafine grinding and magnetic separation were ...
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A high nickel grade ferronickel was produced from laterite ore using the selective reduction-wet magnetic separation process, with the addition of sodium sulfate (Na2SO4).
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The results show that roasting temperature has a great influence on lithium leaching rate, and the leaching effect of lithium is better in the appropriate roasting temperature range. 40% potassium sulfate, 20% sodium sulfate and 20% calcium oxide were added to the lithium mica ore, calcinated at 900 ℃ for 1 h, and the calcine was leached at ...
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For the mechanism of sodium sulphate, Na+ is able to liberate the hosted nickel and iron within lizardite, while SO42– is the sulphur source for the formation of Fe–FeS …
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Li et al. (2012) tested the beneficiation of nickel laterite ore with sodium sulphate (Na2SO4) additions using a two-step process involving reduction roasting, then magnetic separation. The as ...
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The dual effect of sodium-salt-assisted reductive roasting for iron recovery and chromium enrichment from lateritic iron ore was investigated. Iron oxides were reduced to metallic iron through reductive roasting, while Al- and Si-bearing components were transformed to sodium aluminosilicate and/or diaoyudaoite. Thus, direct reduced iron (DRI) was recovered by …
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ABSTRACT In Part II, the correlation between Fe–Ni grain growth and characteristic fusion temperatures of the Na2SO4–laterite mixtures, and phase transformations of the reduced pellets were investigated. For the mechanism of sodium sulphate, Na+ is able to liberate the hosted nickel and iron within lizardite, while SO42– is the sulphur source for the …
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In this process, sodium sulfate was used as an additive for improving the extraction of nickel by converting into Na-pyrosulfate, and more than 97% of nickel could be …
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